/**
 * 
 * Copyright (C) 2011 Cody Stoutenburg . All rights reserved.
 *
 *       This program is free software; you can redistribute it and/or
 *       modify it under the terms of the GNU Lesser General Public License
 *       as published by the Free Software Foundation; either version 2.1
 *       of the License, or (at your option) any later version.
 *
 *       This program is distributed in the hope that it will be useful,
 *       but WITHOUT ANY WARRANTY; without even the implied warranty of
 *       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *       GNU Lesser General Public License for more details.
 *
 *       You should have received a copy of the GNU Lesser General Public License
 *       along with this program; if not, write to the Free Software
 *       Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. 
 * 
 */
package ca.usherbrooke.behaviours.controller.request;

import jade.core.AID;
import jade.lang.acl.ACLMessage;
import jade.lang.acl.MessageTemplate;
import jade.lang.acl.UnreadableException;

import java.io.IOException;

import ca.usherbrooke.agent.controller.EntityUpdaterAgent;
import ca.usherbrooke.agent.message.RequestMessageObjectGoal;
import ca.usherbrooke.behaviours.BasicCyclicBehaviour;
import ca.usherbrooke.behaviours.goal.SubscriptionEntityGoalBehaviour;
import ca.usherbrooke.goal.EntityGoal;
import ca.usherbrooke.utils.ExceptionTool;

/**
 * @author Cody Stoutenburg
 * 
 */
public class SubscriberGoal extends BasicCyclicBehaviour<EntityUpdaterAgent> {
	private static final long serialVersionUID = 1L;

	private static final MessageTemplate TEMPLATE_PERFORMATIVE = MessageTemplate
			.MatchPerformative(SubscriptionEntityGoalBehaviour.SUBSCRIBER_GOAL_PERFORMATIVE);
	private static final MessageTemplate TEMPLATE_PROTOCOL = MessageTemplate
			.MatchProtocol(SubscriptionEntityGoalBehaviour.SUBSCRIPTION_GOAL_PROTOCOL);

	private static final MessageTemplate TEMPLATE_RECEIVE_MESSAGE = MessageTemplate
			.and(TEMPLATE_PERFORMATIVE, TEMPLATE_PROTOCOL);

	/**
	 * @param a
	 */
	public SubscriberGoal(EntityUpdaterAgent a, AID receiver, Long guid) {
		super(a);

		ACLMessage msg = new ACLMessage(
				SubscriptionEntityGoalBehaviour.SUBSCRIPTION_GOAL_PERFORMATIVE);
		msg.setProtocol(SubscriptionEntityGoalBehaviour.SUBSCRIPTION_GOAL_PROTOCOL);
		msg.addReceiver(receiver);

		RequestMessageObjectGoal<Long> request = new RequestMessageObjectGoal<Long>(
				RequestMessageObjectGoal.REQUEST_SUBSCRIBE_GOAL, guid);
		try {
			msg.setContentObject(request);
		} catch (IOException ex) {
			ExceptionTool.showError(ex);
		}
		// send register request
		this.getAgent().send(msg);
	}

	@Override
	public void action() {
		ACLMessage msg = this.getAgent().receive(TEMPLATE_RECEIVE_MESSAGE);

		if (msg != null) {
			try {
				EntityGoal content = (EntityGoal) msg.getContentObject();
				this.getAgent().setEntityGoals(content);
			} catch (UnreadableException ex) {
				ExceptionTool.showError(ex);
			}
		} else {
			block();
		}
	}

	public void unsubscribe() {

	}
}
